Interpolation

Interpolation is a method of estimating values between known data points.
Use interpolation to smooth observed data, fill in missing data, and make
predictions. Curve Fitting
Toolbox™ functions allow you to perform interpolation by fitting a
curve or surface to the data. For more information, see About Interpolation Methods.

To fit an interpolating curve or surface, use the Curve Fitting app. Fit an
interpolating curve or surface at the command line by using the fit function. For
information on choosing an interpolant fit, see Selecting an Interpolant Fit.